1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 5  * This code is free software; you can redistribute it and/or modify it
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 7  * published by the Free Software Foundation.
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 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 
25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHGENERATIONALEVACUATIONTASK_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHGENERATIONALEVACUATIONTASK_HPP
27 
28 #include "gc/shared/workerThread.hpp"
29 
30 class ShenandoahGenerationalHeap;
31 class ShenandoahHeapRegion;
32 class ShenandoahRegionIterator;
33 
34 // Unlike ShenandoahEvacuationTask, this iterates over all regions rather than just the collection set.
35 // This is needed in order to promote humongous start regions if age() >= tenure threshold.
36 class ShenandoahGenerationalEvacuationTask : public WorkerTask {
37 private:
38   ShenandoahGenerationalHeap* const _heap;
39   ShenandoahRegionIterator* _regions;
40   bool _concurrent;
41   bool _only_promote_regions;
42   uint _tenuring_threshold;
43 
44 public:
45   ShenandoahGenerationalEvacuationTask(ShenandoahGenerationalHeap* sh,
46                                        ShenandoahRegionIterator* iterator,
47                                        bool concurrent, bool only_promote_regions);
48   void work(uint worker_id) override;
49 private:
50   void do_work();
51   void promote_regions();
52   void evacuate_and_promote_regions();
53   void maybe_promote_region(ShenandoahHeapRegion* region);
54   void promote_in_place(ShenandoahHeapRegion* region);
55   void promote_humongous(ShenandoahHeapRegion* region);
56 };
57 
58 #endif //SHARE_GC_SHENANDOAH_SHENANDOAHGENERATIONALEVACUATIONTASK_HPP